Chapter 6 page 15 Flashcards
(13 cards)
Classification of lymphocytes
B lymphocyte
T lymphocytes
NK cells
B lymphocytes
develop into b-cell that secrete antibodies ( immunoglobulins)
T lymphocytes
regulate other immune cell or kill-virus infected cells.
NK cell
kill virus infected cells and tumor cells
Soluble immunoglobulins attach to antigens and make them recognizable to phagocytic cells as objects that should be phagocytosis called _______?
Opsonization
What happen when inflammation occurs?
Interleukin-4
Interleukin-10
Interleukin-10 are important
maintenance of gut epithelium becomes permeable and facilitates invasion by parasites such as Entamoeba histolytica.
Secretions of the outer and inner body surfaces protect the host through being either
- toxic
- prevent parasite from making contact with the body.
- Secretions produced in response to specific stimuli
Colonisation by the protozoan parasite
- Trichomonas vaginalis affected by the pH of the vaginal fluid.
- normal vaginal pH is acidic while Trichomonas vaginalis grows better in a more alkaline environment.
Lactobacillus acidophilus (bacteria) is an important member
- vaginal flora (yogurts)
- lactic acid present in vaginal secretions
- uncertain relationship between vaginal lactobacilli and Trichomonas vaginalis.
Parasite invades its host by
physically penetrating into hosts body- even if this is only to insert its feeding apparatus.
Acute inflammatory response:
Leukocytes detects invader or cell damage and are stimulated to phagocyte the debris and foreign material.
Cell-mediated immunity
- Th1 promotes cell-mediated immunity activating neutrophils and macrophages producing nitric acid.
- Th2 response: produces cytokines that suppress the production of IFN-gamma(stimulates neutrophils and macrophages).
